Seiko Cal. 5644 - 425

Seiko 5644-425

This Spring Drive model from 1970 features a 42mm Hardlex-Coated Steel case. The Fixed bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-e6a61a2a33bd]

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
9.9mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
200m
Dial Color
Blue Sunburst
Jewels
18j
Frequency
21,600 bph
Power Reserve
70 hours
Year
1970

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